000
FXUS63 KLSX 310433
AFDLSX
AREA FORECAST DISCUSSION...UPDATED AVIATION
NATIONAL WEATHER SERVICE ST LOUIS MO
1133 PM CDT THU JUL 30 2015
.UPDATE:
ISSUED AT 909 PM CDT THU JUL 30 2015
A DRY AND TRANQUIL NIGHT REMAINS ON TAP WITH SURFACE HIGH PRESSURE
IN CONTROL AND A FEW PASSING HIGH CLOUDS. MIN TEMPS WILL BE A TAD
BELOW AVERAGE IN THE 60S.
GLASS
&&
.SHORT TERM: (THROUGH LATE TONIGHT)
ISSUED AT 354 PM CDT THU JUL 30 2015
QUIET WEATHER WILL CONTINUE ACROSS THE AREA TONIGHT AS HIGH PRESSURE
BUILDS SOUTH THROUGH THE MISSOURI RIVER VALLEY. CLEAR SKY AND LIGHT
WIND SHOULD ALLOW FOR GOOD RADIATIONAL COOLING AGAIN TONIGHT, AND WE
SHOULD COOL OFF NICELY. USED THIS MORNING`S LOWS AND DEWPOINT
TEMPERATURES AS A GUIDE BLENDED WITH A DOSE OF MOS GUIDANCE TO YIELD
LOWS FROM AROUND 60 TO NEAR 70 IN THE STL METRO TONIGHT.
CARNEY
.LONG TERM: (FRIDAY THROUGH NEXT THURSDAY)
ISSUED AT 354 PM CDT THU JUL 30 2015
THE UPPER LEVEL PATTERN AMPLIFIES OVER THE CONUS THROUGH THE
WEEKEND AND INTO EARLY NEXT WEEK AS THE HUDSON BAY LOW DEEPENS AND A
SHARP RIDGE BUILDS OVER THE ROCKIES. THIS WILL RESULT IN NORTHWEST
FLOW ALOFT OVER THE MISSISSIPPI VALLEY. LOW LEVEL FLOW TURNS BACK
TO THE SOUTH-SOUTHWEST OVER THE GREAT PLAINS ON FRIDAY AND INTO
NORTHWEST MISSOURI FRIDAY NIGHT. THIS LOW LEVEL SOUTHERLY FLOW WILL
SPREAD EASTWARD OVER THE WEEKEND AND COMBINED WITH A COUPLE OF FAST-
MOVING SHORTWAVES WILL PRODUCE SCATTERED THUNDERSTORMS...THE FIRST
POTENTIALLY FRIDAY NIGHT INTO EARLY SATURDAY MORNING AND THE SECOND
LATE SATURDAY NIGHT INTO EARLY SUNDAY MORNING. TEMPERATURES SHOULD
BE SEASONABLY WARM...AND DEWPOINT TEMPERATURES WILL LIKELY CLIMB
BACK INTO THE LOW 70S WHICH WILL MAKE IT FEEL MORE LIKE THE DOG DAYS
OF SUMMER. GFS AND ECMWF DIFFER SLIGHTLY OUT IN THE MEDIUM RANGE
WITH THE GFS CONTINUING TO AMPLIFY THE PATTERN AND PUSHING A COLD
FRONT THROUGH MISSOURI DOWN INTO ARKANSAS AND OKLAHOMA BY WEDNESDAY
EVENING WHILE THE ECMWF IS NOT NEARLY AS STRONG. REGARDLESS THERE
SHOULD BE AN INCREASED CHANCE FOR PRECIPIATION BY MID WEEK AND
POTENTIALLY LOWER TEMPERATURES.
CARNEY
&&
.AVIATION: (FOR THE 06Z TAFS THROUGH 06Z FRIDAY NIGHT)
ISSUED AT 1128 PM CDT THU JUL 30 2015
WEAK FRONT IS EXPECTED TO PASS THROUGH REGION DRY FRIDAY
AFTERNOON/EVENING. SLIGHT INCREASE IN CLOUD COVER WITH THAT
FEATURE BUT OTHERWISE...VFR CONDITIONS AND LIGHT WNW WINDS.
SPECIFICS FOR KSTL:
VFR CONDITIONS WITH LIGHT WNW WINDS THROUGH LATE FRIDAY NIGHT.
GOSSELIN
&&
.LSX WATCHES/WARNINGS/ADVISORIES:
MO...NONE.
IL...NONE.
&&
$$
WFO LSX